I posted this same thread in the General Forums, but upon further thought, here seems like a more appropriate place for it.
Wall of text ahead, apologies in advance. But I believe the reading will be worthwhile for those interested in the Lore.
The Scourge? Or at least leader of the remaining undead?
Although the Lich King is no longer a ‘thing’, the Undeads still pose a significant threat, and Northrend is still teeming with it, despite efforts to contain them as the Crown of Domination that Bolvar used to hold them back was destroyed.
Well, we know that Sir Denathrius is MIA, thirsting for revenge against those who imprisoned him (even briefly) in his sword Remornia, under the watch of Z’rali (The Naaru).
And also we know that Denathrius is the leader and/or creator of the Nathrezim (AKA Dreadlords) and that the Scourge, in a way, was an experiment by those same Nathrezim to battle against the Elves, during the glory days of the Burning Legion. (By warcraft.wiki, not sure if it’s still a thing or retcon)…
I can see a possibility of Sir Denathrius returning and taking control of the remaining Undeads in Northrend, creating a ‘new’ Scourge.
One of the few good things about Shadowlands was Denathrius, who fortunately is a very interesting and charismatic villain. I have a lot of sympathy for him and believe that, if well utilized, he has enormous potential to be a very memorable villain.
And perhaps him returning with the goal of controlling and creating a new legion of Undeads would be a great opportunity to utilize him well. (And to bring the San’layn back as well.)
Again, sorry for the wall of Text.